li {
  list-style: none;
}
html,
body {
  width: 100%;
  height: 100%;
  font-size: 62.5%;
  font-family: "微软雅黑";
  background: #f0f0f0;
}
.header {
  width: 100%;
  display: flex;
  height: 1.17333333rem;
  background: #27c1b4;
  align-items: center;
  font-size: 32px;
  color: #fff;
  position: fixed;
  top: 0;
  z-index: 2;
}
.header .left {
  width: 4em;
  text-align: center;
}
.header .center {
  flex: 1;
  text-align: center;
}
.header .right {
  width: 4em;
  text-align: center;
}
